Bolt Base M10 ( 10mm )A2 Stainless Steel Hexagon Left Hand Thread Full Nuts Hex Reverse Nut - 5 Pack Corrosion Resistant A2-70 Stainless Steel Left Hand Hex Full Nuts - DIN 934 10mm Metric Thread, M10 - 1.50mm Pitch Spanner/ Wrench Size- 17mm Not Suitable For Replacing High Tensile Fasteners